IOPTE_TABLE_SIZE
p = kmem_cache_create("iopte_cache", IOPTE_TABLE_SIZE, align, flags,
dma_unmap_single(obj->dev, pt_dma, IOPTE_TABLE_SIZE,
*pt_dma = dma_map_single(obj->dev, iopte, IOPTE_TABLE_SIZE,
dma_unmap_single(obj->dev, *pt_dma, IOPTE_TABLE_SIZE,